If your computer can boot from an USB device and that you have some USB flash, format a bootable DOS partition on it and put the required files on it.

What else, you can burn a bootable DOS CD. You will just not be able to backup the older BIOS if you don't have a FAT32 HDD partition.

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Hi DragonMaster,

how can i do a bootable DOS CD?

HP gave me a downloaded BIOS upfile. The file will automatically prompt me a screen to indicate which diskette drive i should put. (selection only 'A' or 'B').
Once it got the bootable DOS CD, how can i tranfer the necessary BIOS data to the bootable DOS CD?

Install the driver and enable the drive. Let the HP utility write its stuff and unmount your floppy. Ask your CD burning software to create a bootable CD and point it to the floppy image you got from the virtual drive.